发明名称 |
Process for forming direct positive images, direct positive silver halide elements, compositions and compounds as characteristics feature of such processes and elements |
摘要 |
Direct positive photographic elements are disclosed employing internal latent image silver halide emulsions associated with developer autoxidation promoter agents constituted by 5 or 6 membered nucleus-containing heterocyclic compounds comprising an azomethine group, whose methine group is substituted with a 5-amino-1,2,4-triazolyl group, and/or copper complex compounds thereof. Preferably said direct positive photographic elements are multi-layer elements comprising internal latent image type type silver halide emulsion layers sensitized to different regions of the visible light and associated with image-dye providing compounds (photographic color couplers).
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申请公布号 |
US4636457(A) |
申请公布日期 |
1987.01.13 |
申请号 |
US19850755292 |
申请日期 |
1985.07.15 |
申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
VALBUSA, LUIGI;CORALUPPI, ENZO;QUAGLIA, ANDREA;TAVELLA, MARIO |
分类号 |
C07D401/14;C07D249/14;C07D403/14;C07D487/04;G03C1/06;G03C1/40;G03C1/485;G03C5/315;G03C5/50;G03C7/00;(IPC1-7):G03C5/24 |
主分类号 |
C07D401/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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